ok yer i don't want an argument either and i very well believe this thing can achieve 550fps But i reckon it wouldn't happen at 100psi. but i could possibly be wrong coz you do have a very long barrel so whatever it is doesn't matter, its a good gun it brings the same enjoyment as anything else you ...

hahahah thats funny as, hury up an tell us what the hell happend.

its very basic, how far does it shoot? what do u use for fuel? and what kin of ignition are u using?